Ignition Coil: Service and Repair

Replacing Ignition Coil (M52, M52TU, S52, S50US, M54)

Turn off ignition.
Remove cover for ignition coils.







Unlock ignition coil plugs.
Detach plugs from ignition coils.







Release screws of ignition coil.
Withdraw ignition coil.


Installation: Screw down grounding strap (1) to cylinder head cover mounting and to ignition coil for cylinders 1 and 6.

On metal covers:
Screw down grounding strap of cable duct to cylinder head cover mounting between cylinders 2 and 3.







Installation
M52 plastic cover:
Screw down grounding strap (1) of cable duct with connecting plate (2) of ignition coils.







Installation:
Plastic cover M52TU, M54:
Screw down grounding strap (1) of connecting plate of ignition coils to retaining pin of ignition coil of cylinder 1. Screw down grounding strap (2) of cable duct to connecting plate of ignition coils between cylinders 2 and 3.


NOTE:
Interrogate fault memory of DME control unit.
Check stored fault messages.
Rectify faults.
Then clear fault memory.